Luminaire



FIG. 1 is a perspective view;

FIG. 2 is a top plan view;

FIG. 3 is a bottom plan view;

FIG. 4 is a left elevation view;

FIG. 5 is a front elevation view;

FIG. 6 is a right elevation view; and,

FIG. 7 is a rear elevation view.

The broken lines illustrate environmental components of the luminaire which form no part of the claimed design. 

The ornamental design for a luminaire, as shown and described. 